From: diverse@tcp.co.uk   
      
   2 peltier units in one cabinet.   
   The lower unit lost thermostat control and on full whack continuously.   
   I disconected that one and run on the top unit only, but with display   
   panel and lower unit unpowered the top unit ran at half cock   
   continuously which was ok for the intended use as a non-freezer box low   
   power fridge.   
   Until , as no protection from dripping condensate , condensate drip from   
   the skyved heatsink physically corroded a pin of a small 78L08 100mA   
   volt reg., diode checking the whole board cold, main active devices   
   looked reasonable, fuses and low ohm Rs ok.   
   I had thought if that top control unit failed at any time I could swap   
   it for the bottom. Both are marked fanny.com.cn PCB100729K1, MP 011   
   Replaced the VR and no fan kick, green LED flashes on then off and red   
   LED on . I swapped control units and the identical green and red LED   
   function and no fan kick also.   
   No idea what to expect putting a DVM on both isolated peltier units,   
   top one on resistance each way was 12 ohm and -1 ohm presumably from the   
   dissimilar metals in series , the lower one 13ohm and -4 ohm which as   
   far as it goes ,are presumably ok.   
   Before checking out the output side of the PS active devices AZ494AP and   
   LM358P , conventional DIP devices, something silly I've overlooked?   
   I will try the lower unit in isolation tomorrow.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)